Brake-operating mechanism.



N. KROHN. BRAKE OPERATING MECHANISM.

APPLICATION FI LED. JULY 19. 1-925.

Eatented A r. n, 1918.

pnirnn sa arns oration.

NELS KRCHN, OF CHICAGO, ILLINOIS, ASSIGNQR TO THE ADAMS 8c WESTLAKE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRAKE-OPERATING MECHANISM.

To all whom, it may concern Be it known that 1, Nine Knonn, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Brake-Operating Mechanism, of which the following is a specifica-' I tion, and which are illustrated in the accompanying drawings, forming a part thereof. The invention relates to mechanism for operating brakes of railway cars, its objects 11 of Fig. 2';'"Fig. 2 is a detail elevation of the device, some parts being broken away;

Fig. 3 is a. detail section on the line 3-3 of Fig. 1, and Fig. 4 is an inverted view of a portion of the mechanism housing.

The brake staff 10 is of ordinary form, its

upper end being journaled in a bracket 11 adapted for attachment to the wall'of a car. An operating ratchet 12 is fixed upon the staff above the journal, and a holding ratchet 13 is fixedtthereon below the bracket. 'A'

hand-operated pawl 14, pivoted to the bracket 11, cooperates with the' holding ratchet 13. A head, preferably in'the form of a casing 15, is swiveled upon the upper end of the' 'staif adjacent the ratchet 12,:

which, as shown, it inclosesj Upon or within thiscasing apawl 17, for cooperating with the ratchet is oscillatably mounted, preferably being provided with a pivot pin 16.

A handle 18 is pivotally attached to the pawl, as shown at 19, and projects through a suitable aperture, ,20 in the casing 15, affording means for throwing the pawl into and out of engagement with the ratchet. 'The' casing aperture is of greater width than the thickness of the handle, thereby permitting the necessary movement of the han- "dle withreference to the casing to oscillate the pawl upon its pivot 16, for the purpose I of controlling its engagement with the teeth of the ratchet. The initial movement of the handle in the direction for winding up the brake throws the nose of the pawl into en- Specification ofLetters Patent.

' disengagement of the pawl.

Patented a t. 111; 1916.

Application filed. I u1y 19, 1915. Serial No. 40,723.

gagement with the ratchet, and the initial movement of the handle in the'opposite' direction disengages the pawl therefrom. The casing aperture extends into the lower wall 21 of the casing, theinner end of this extension being contracted, One ofits edges 22 being inclined to form a cam surface for engagement by the handle as it is lowered, thereby releasing the pawl from the ratchet.

' Preferablythe cam face 22 is so formed that the lowering of the handle to a position approximately forty-five degrees effects the For a quick release of the brake the operating handle is dropped or allowed to remain in its lowered position, and the pawl 1 1 is disengaged from the ratchet 13. A

gradual or partial release of. the brake is effected" by holding the operating handle in its upper position, releasing the pawl 14, swinging the operating handle backwardly, and again engaging the ratchet 13. Should furtherreleai'e he desired the operating hand-le may be dropped sufliciently to disengage the pawl .1! from the ratchet 12 and swung forward while still in its lowered position.

Upon again raising the handle the holding pawl may he disengaged and the brake further released by swinging the operating handle b'ackwardly, as before.

Preferably, as shown in Fig. 3, the two ratchets are formed as an integral casting, the intervening metal forming a hub which fits and turns within the box 23 forming the staff bearing. The attachment of the ratchet block to the staff may be by means of a pin' 24 set through this hub. The location of the holding ratchet near the upper end of the staff is, however, not essential,the'setting mechanism being capable of use in connection with the ordinary foot-controlled holding device.

oscillatable about the axis of the stafi, a

handle mounted on the head and having.

. head.

3. In car brake mechanism, in combination, a rotatable stafi, a ratchet fixed on the staff, a head oscillatable on the axis of the staff, a pawl pivotally mounted on the head and coiiperating with the ratchet, a handle attached to the pawl and having lateral movement with reference to the head.

4:. In car brake mechanism, in combination, a rotatable staff, a ratchet fixed on the staff, a head oscillatable on the axis of the staff, a pawl pivotally mounted on the head and cofip'erating with the ratchet, a handle pivotally attached to the pawl and having lateral movement with reference to the head.

5. In car'brake mechanism, in combination, a rotatablestaff, a ratchet fixed on the staff, a head oscillatableon the axis of the staff, a pawl pivotally mounted on the head and cooperating with the ratchet, a handle pivotally attached to the pawl and having lateral movement with reference to the head,

and a camon the head for deflecting the hariplle laterally as it. swings toward the sta 6. In car brake mechanlsm, in combination, a rotatable staff, a ratchet fixed on the staff, a head oscillatable on the axis of the staff, a pawl pivotall-ymounted on the head and cooperating with the ratchet, a handle pivotally attached to the pawl and having Jateral movement with reference to the head, ja-nd a cam on the head for deflecting the handle laterally as it swings downwardly on its pivot;

7 In car brake mechanism, in combination, a staff, a ratchet fixed'on the staff, a

pawl carrier oscillatable about the'axis of the staff, a pawl carried by the. carrier for cooperating with the ratchet, a handle pivotally mounted to swing toward and away from the staff and t6 oscillate transversely thereto, such handle being adapted to engage the pawl with the ratchet when moved in one direction about the axis of the staff and to withdraw the pawl from the ratchet when swung toward the staff.

8. In car brake mechanism, in combination, a staff, a ratchet fixed thereon, a pawl cotiperating with the ratchet, an oscillatable support for the pawl, an oscillatable drop handle arranged to move the pawl into engaging relation with the ratchet when moved in one direction of its oscillation and ported within the casing for vertical movement and projecting through and having lateral movement in an opening in the easing, such opening having one: of its side walls inclined toward the median line of the hand lever, such lever being adapted by its lateral movement in one direction to force the pawl into engagement with the ratchet 10. In car brake mechanism, in c0mbination, a rotatable staff, a ratchet fixed on the staff, a casing oscillatable on the axis of the staff, a pawl oscillatably mounted within the casing and coiiperating with the ratchet, a handle attached to the pawl and having lateral movement with reference to the casing.

11. In car brake mechanism, in combination, a-rotatable staff, a ratchet fixed on the staff, a casing oscillatable on the axis of the staff, a "pawl oscillatably mounted within the casing and coiiperating with the ratchet, a handle pivotally attached to the pawl and having lateral movement with reference to the casing.

12. In car brake mechanism, in combination, a rotatable staff, a ratchet fixed on the staff, a casing oscillatable on the axis of the staff, a pawl oscillatably mounted within the casing and codperating with the ratchet, a handle pivotally attached to the pawl and; having lateral movement with reference to handle'pivotally attached to the pawl and having lateral movement with reference to thecasing, and a cam on the casing for defleeting the handle laterally as it swings downwardly on its pivot.

14. In car brake mechanism, in combination, a staff, a ratchet on the staff, a casing .mounted to oscillate about the staff, a pawl oscillatable within the casing and cotiperating with the'ratchet, a hand lever pivotally supported within the casing for vertical movement and projecting through and having lateral movement in ansopening in the casing, such opening having one of its side walls inclined toward the median line of the Lwseee a hand lever, such lever being adapted by its with the ratchet, and an oscillatable drop lateral movement in one direction to force handle arranged to move the pawl radially the pawl into engagement with the ratchet. toward the ratchet when meved in one direc- 10 15. In car brake mechanism, in combination of its oscillation and to withdraw the 5 tion, a staff, a ratchet fixed thereon, an elepawl from the ratchet when dropped.

ment oscillatable about the stall axis, a pawl pivoted on such element for coiiperating NELS KROHN. 

